An advanced aqueous sodium-ion supercapacitor with a manganous hexacyanoferrate cathode and a Fe3O4/rGO anode

Author(s): Ke Lu ¹ ^, ² ^, ³ ^, ⁴ ^, ⁵ , Dan Li ¹ ^, ² ^, ³ ^, ⁴ ^, ⁵ , Xiang Gao ¹ ^, ² ^, ³ ^, ⁴ ^, ⁵ , Hongxiu Dai ¹ ^, ² ^, ³ ^, ⁴ ^, ⁵ , Nan Wang ¹ ^, ² ^, ³ ^, ⁴ ^, ⁵ , Houyi Ma ¹ ^, ² ^, ³ ^, ⁴ ^, ⁵

Publication date (Electronic): 2015

Journal: Journal of Materials Chemistry A

Publisher: Royal Society of Chemistry (RSC)

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Abstract

This paper demonstrates how to design and construct an advanced aqueous sodium-ion supercapacitor by using manganous hexacyanoferrate (MnHCF) as the cathode material and Fe ₃O ₄/rGO nanocomposites as the anode material. The rational combination of these two materials with neutral aqueous electrolytes provides the devices with an extended voltage of 1.8 V, much higher power density (2183.5 W kg ⁻¹) and energy density (27.9 W h kg ⁻¹) compared with similar devices reported in the literature. The devices also have good cycling stability with 82.2% capacity retention even after 1000 cycles. More significantly, the supercapacitors are designed with low cost and environmentally benign materials and are more suitable for future large-scale practical applications.

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Advanced materials for energy storage.

Chang Liu, Feng Li, Lai-Peng Ma … (2010)

Popularization of portable electronics and electric vehicles worldwide stimulates the development of energy storage devices, such as batteries and supercapacitors, toward higher power density and energy density, which significantly depends upon the advancement of new materials used in these devices. Moreover, energy storage materials play a key role in efficient, clean, and versatile use of energy, and are crucial for the exploitation of renewable energy. Therefore, energy storage materials cover a wide range of materials and have been receiving intensive attention from research and development to industrialization. In this Review, firstly a general introduction is given to several typical energy storage systems, including thermal, mechanical, electromagnetic, hydrogen, and electrochemical energy storage. Then the current status of high-performance hydrogen storage materials for on-board applications and electrochemical energy storage materials for lithium-ion batteries and supercapacitors is introduced in detail. The strategies for developing these advanced energy storage materials, including nanostructuring, nano-/microcombination, hybridization, pore-structure control, configuration design, surface modification, and composition optimization, are discussed. Finally, the future trends and prospects in the development of advanced energy storage materials are highlighted.